"I was sleeping and I happened to wake up to a lot of screaming and shouting. I looked outside and saw there was a fire," said Ellis Jackson, who lived in one of the homes that caught fire.

The blaze took over a home on the 1700 block of the street where one woman and five kids were living.

"I live in the third house, and they woke me up. When I came out, the porch was just ablaze. They said they were trying to get in to find out if there was anyone left in the house," neighbor Ryan Marshall said.

Jackson ran inside to try and rescue any of the children he could find.

"I went in and got one of the boys," he said. "I tried to go back in, but it was too much."

McKeesport Fire Chief Kevin Lust said Ayanna's aunt was caring for her and the other children in the home while the girl's mother was visiting relatives out of town. He said he believes both women lived in the home with the five children.

Ayanna was "so sweet," neighbor Cassandra Mack said. "We would sit outside and the little girl would come up to me and say, 'Want some candy?'"

Crews spent hours Monday morning searching for the child's body in the rubble. Investigators believe she was sleeping on the top floor of the home. One of her cousins tried to go back inside to save her, according to Lust.

"As we find out, it was a cousin that tried to go back in, and a neighbor went and got him before he went back," said Lust.

That boy was rushed to UPMC Mercy with burns on his head and hand, according to investigators. One firefighter suffered a shoulder injury while battling the flames, and one had to be carried out after a collapse.

The fire spread so quickly that three other homes were damaged. Four families were displaced by the fire, according to Lust.

Mack told Pittsburgh's Action News 4 that a boy who lived in the house with five children alerted her to the fire.

"(I was) just lying in my bed, and I hear all this commotion. I hear the kids hollering," she said. "All I hear is somebody tearing down my door. 'Ms. Cassandra, get out! Get out!'"

A YOUNG CHILD DIES IN A HOUSE FIRE AND TONIGHT THE DISTRICT ATTORNEY SAYS SOMEONE SET IT BUT HE WILL NOT BE FILING ANY CHARGES GOOD EVENING, PITTSBURGH. THE ACCUSED ARSONIST IN THIS CASE, A CHILD LIVING SIGN THAT HOUSE. PITTSBURGH ACTION NEWS 4 REPORTER WAS AT THE HOME AT THE ALLEGHENY COUNTY D.A. GOTTEN A UP CLOSE LOOK AT THE SCENE OF THE FATAL FIRE. Reporter: BASICALLY, WHAT THE D.A. IS TELLING US AS HE WENT INTO THE STRUCTURE THERE THAT IT WAS A CHILD WHO SET THE FIRE AND WE BELIEVE HE IS FIVE YEARS OLD. SOMETHING ELSE WE LEARNED FROM THE DISTRICT ATTORNEY IS THAT THE TWO-YEAR-OLD GIRL WHO DIED IN THE FIRE WAS ACTUALLY HIDING WHEN SHE WAS OVERCOME BY SMOKE. DISTRICT ATTORNEY STEPHEN ZAPPALA JOINED FIRE INVESTIGATORS ON A STACK OF ASHES AND CHARRED DEBRIS DAYS AFTER A BLISTERING BLAZE THAT KILLED A TWO-YEAR-OLD GIRL AND DESTROYED FOUR HOUSES, ZAPPALA SAYS IT WAS NO ACCIDENT. THIS IS ARSON. IT'S NOT A NATURAL FIRE. Reporter: ZAPPALA TELLS REPORTERS A CHILD UNDER THE AGE OF TEN SET THE FIRE BUT HE IS OVERHEARD INQUIRING WITH INVESTIGATORS, ASKING IF IT'S THEIR INDICATION THAT A FIVE-YEAR-OLD SET THE FIRE. HE SAYS HIS INVESTIGATORS INTERVIEWED THE BOY WHO THEY BELIEVE SET THE BLAZE. THIS KID BASICALLY SAID HE TRIED TO SET THE HOUSE ON FIRE. HE GAVE US SUFFICIENT INFORMATION THAT WE CAN CONCLUDE THAT HE WAS THE SOURCE OF THE FIRE. IT WAS A LIGHTER AND THIS WAS NOT AN ACCIDENT. THERE WAS -- YOU KNOW, YOU LIGHT PIECES OF PAPER TOGETHER, FURNITURE STARTS TO COMBUST. GIVEN THE STRUCTURE OF THE HOUSE AND THE CONSTRUCTION OF THE HOUSE, IT WENT UP IN A HURRY. Reporter: TWO-YEAR-OLD AYANNA BROOKS DIED IN THE FIRE. SHE WAS THERE WITH FOUR OTHER KIDS AND HER AUNT. THE MEDICAL EXAMINER SAYS SHE DIED FROM SMOKE INHALATION. ZAPPALA SAYS THE LITTLE GIRL WAS TRAPPED. THE CHILD WAS PROBABLY HIDING, WE BELIEVE WAS HIDING FROM THE FIRE. Reporter: ZAPPALA WILL ALSO GO AFTER THE LANDLORD. HE SAYS THERE'S NO INDICATION THE HOUSE WAS EQUIPPED WITH SMOKE ALARMS. PEOPLE IN RESPONDED, SOME USED THE CHARACTERIZATION IT WAS EARLY SILENT WHICH WOULD TEND TO INDICATE THAT THERE WERE NO SMOKE DETECTORS, NO FIRE ALARMS. Reporter: NOW, ZAPPALA ALSO SAYS BY LAW THEY CAN NOT PROSECUTE A CHILD UNDER THE AGE OF TEN, BUT IN THIS CASE THEY WANT TO BRING THAT CHILD BEFORE A JUVENILE COURT JUDGE AND DETERMINE IF HE SHOULD BE PLACED IN FOSTER CARE OR SOME FORM OF